Double flow-circuit heat exchange device for periodic positive and reverse directional pumping

ABSTRACT

The present invention discloses the double flow circuit heat exchange operating function for periodic positive and reverse directional pumping, wherein the fluid ports at the two sides of double flow circuit type heat exchanger are equipped with the bidirectional fluid pumping device capable of producing positive or negative pressures for periodically positive or reverse pumping the two circuits of fluids in different flow directions, while maintaining the relationship of different flow directions between the two circuits of fluids during the periodic positive or reverse pumping operations.

BACKGROUND OF THE INVENTION

(a) Field of the invention

The present invention improves the conventional heat exchange device having pumping fluids in different flow directions to have the heat exchange operating function of double flow circuit for periodic positive and reverse directional pumping thereby timely improving the temperature difference distribution between the fluid and the heat exchanger, and when the heat exchanger inside the heat exchange device is further insertingly installed or coated with desiccant material, or the heat exchanger itself is the full heat exchanger having concurrent moisture absorbing function, then it is through the double flow-circuit periodic positive and reverse directional pumping fluid and the heat exchanger being insertingly installed or coated with desiccant material, and /or the heat exchanger itself having concurrent moisture absorbing function to constituted the dehumidification effect of full heat exchange function as well as to reduce the imperfections of dust accumulation production at fixed flow directions.

(b) Description of the Prior Art

For conventional heat exchange device or full heat exchange device for pumping fluid at different flow directions, as its fluid flow directions are fixed, the temperature difference distribution gradients between thermal exchange fluids and the internal heat exchangers are therefore unchanged; further beside of that distribution gradients of the temperature differences and humidity saturation degrees between fluids and internal heat exchanger are unchanged, the fluids in different flow directions also form the differences of humidity saturation degrees at the two flow inlet/outlet ends and sides of the heat exchanger.

SUMMARY OF THE INVENTION

The present invention discloses that the conventional heat exchange device having pumping fluids in different flow directions is made to have the double flow-circuit heat exchange device for periodic positive and reverse directional pumping thereby obtaining the following advantages: 1) the temperature difference distribution status between the fluid and heat exchanger is periodically changed to increase the temperature difference conditions for heat absorption and release of the internal heat exchanger thereby promoting the heat exchange efficiency; 2) for the applications of the heat exchanger being insertingly installed or coated with desiccant material, or the heat exchanger itself having concurrent moisture absorbing function, or the fluid piping being series connected with moisture absorbing device, said two fluids at different flow direction form temperature difference and humidity saturation degrees at the two inlet and outlet ports and two sides of the two fluids in different flow directions of the heat exchanger inside heat exchanger device thereby promoting the dehumidification effect; 3) The impurities brought in by the fluid flow at previous flow direction are discharged by the double flow circuit periodic positive and reverse directional pumping fluids thereby reducing the disadvantages of impurity accumulations at fixed flow directions.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing operating principles of the conventional bi-directional heat exchange device or full heat exchange device.

FIG. 2 is the main structural block schematic view of the double flow-circuit heat exchange device for periodic positive and reverse directional pumping of the present invention.

FIG. 3 is structural block schematic view of the present invention showing that the heat exchange device (1000) having four inlet/outlet ports for bidirectional fluid flow is installed with the bidirectional fluid pumping device (123) constituted by fluid pumping devices (111), (112), (113), (114) being capable of producing negative pressure to attract fluid, wherein it is operatively controlled by the periodic fluid direction-change operative control device (250) for periodically changing the flow directions of the fluids while maintaining the two fluids in two different flow directions.

FIG. 4 is a schematic view showing operating principles of the conventional heat exchange device having pumping fluids in different flow directions during simultaneous operation.

FIG. 5 is a schematic view showing the operation principles of the present invention.

FIG. 6 is a temperature distribution diagram of the heat exchange layer of the conventional heat exchange device having pumping fluids in different flow directions during simultaneous operation.

FIG. 7 is a temperature distribution variation diagram of the heat exchange layer of the present invention during simultaneous operation.

FIG. 8 is the humidity distribution diagram of the full heat exchanger layer of the conventional full heat exchange device having dehumidification function being pumping fluids in different flow directions during simultaneous operation.

FIG. 9 is the humidity distribution diagram of the operating full heat exchange layer of the full heat exchange device having dehumidification function of the present invention.

DESCRIPTION OF MAIN COMPONENT SYMBOLS

-   100: Heat exchanger -   200: Full heat exchanger -   111, 112, 113, 114: Fluid pumping device capable of producing     negative pressure to attract fluid -   123: Bidirectional fluid pumping device -   250: Periodic fluid direction-change operative control device -   1000: Heat exchange device -   a, b, c, d: Fluid port

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 is a schematic view showing operating principles of the conventional bi-directional heat exchange device or full heat exchange device. As shown in FIG. 1, it usually has two fluid pumping devices of different flow directions and four fluid ports, wherein two fluids with temperature difference are pumped at different flow directions through the two sides of heat exchanger (100) inside the heat exchange device (1000) and are entered from the fluid ports at different sides and discharged out of the fluid ports at the other side; such as that for the example of the heat exchange device for indoor-outdoor air change in cold winter times, wherein the indoor higher temperature air flow is pumped to heat exchange device (1000) via fluid port (a) and is discharged to outdoors via fluid path at one side of heat exchanger (100) and fluid port (b), and the lower temperature outdoor fresh air is pumped to heat exchange device (1000) via the fluid path at another side of heat exchanger (100) and discharge into indoors via fluid port (d), and fluid port (a) and fluid port (d) are for connection to indoors while fluid port (c) and fluid port (d) are for connection to the outdoors, during stable operation, the path between fluid port (a) and fluid port (b) at one side of heat exchanger (100) of heat exchange device (1000) is formed with a temperature distribution from high temperature at fluid port (a) to the lower temperature at fluid port (b), and the path between fluid port (c) and fluid port (d) at the other side is formed with a temperature distribution from the lower temperature at fluid port (c) to gradually rise to the higher temperature at fluid port (d), wherein the heat exchange efficiency is determined by fluid property, fluid speed and the temperature difference of the fluids at the two sides of heat exchanger of the heat exchange device; in case for the application of heat exchanger being insertingly installed or coated with desiccant material, or the heat exchanger itself is the full heat exchanger (200) having concurrent moisture absorbing function, then said two fluids at different flow direction form temperature difference and humidity saturation degree difference at the two inlet and outlet ports and two sides of the two fluids in different flow directions of the full heat exchanger (200) inside heat exchanger device (1000).

FIG. 2 is main structural block schematic view of the double flow-circuit heat exchange device for periodic positive and reverse directional pumping of the present invention;

As shown in FIG. 2, for the double flow-circuit heat exchange device for periodic positive and reverse directional pumping, the conventional heat exchange device (1000) is installed with the bidirectional fluid pumping device (123), and the periodic fluid direction-change operative control device (250) for operatively controlling the bidirectional fluid pumping device (123) so as to allow the fluids in two different flow directions appearing periodic change of different flow directions to pass through heat exchanger (100) inside heat exchange device (1000), wherein:

The bidirectional fluid pumping device (123): It is constituted by 1) at least four fluid pumping devices capable of producing positive pressure to push fluid; 2) at least four fluid pumping devices capable of producing negative pressure to attract fluid; or 3) at least two fluid pumping devices having both functions of producing positive pressure to push fluid and negative pressure to attract fluid for pumping gaseous or liquid state fluids, wherein the fluid pump is driven by electric motor, engine power, or mechanical or electric power converted from other wind power, thermal energy, temperature-difference energy, or solar energy, etc.;

Said bidirectional fluid pumping device (123) and heat exchange device (1000) are in an integral structure or are in the separated structures.

The periodic fluid direction-change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the two fluids in different flow directions thereby operatively controlling the distribution status of 1) temperature difference; or 2) humidity difference; or 3) both temperature difference and humidity difference between fluids and heat exchanger (100) of heat exchange device (1000);

The timing for fluid periodic flow direction change can be 1) the open loop type operative control by presetting the direction-change period of fluid flow, or 2) the closed loop type operative control by detecting the temperature or humidity difference between fluid and heat exchanger of heat exchange device at setting locations or by simultaneously referencing the status of temperature or humidity difference values for closed loop fluid flow direction change timing operative control; or 3) randomly manual change.

FIG. 3 is structural block schematic view of the present invention showing that the heat exchange device (1000) having four inlet/outlet ports for bidirectional fluid flow is installed with the bidirectional fluid pumping device (123) constituted by fluid pumping devices (111), (112), (113), (114) being capable of producing negative pressure to attract fluid, wherein it is operatively controlled by the periodic fluid direction-change operative control device (250) for periodically changing the flow directions of the fluids while maintaining the two fluids in two different flow directions;

As shown in FIG. 3, the heat exchange device (1000) being in an integral structure or the separated structures is constituted by four fluid pumping devices (111), (112), (113), (114) capable of producing negative pressure to attract fluid thereby constituting the functions of bidirectional fluid pumping device (123), wherein the four fluid pumping devices (111), (112), (113), (114) are respectively installed at fluid port (a), fluid port (b), fluid port (c), and fluid port (d) to attract the fluid for different flow directions; said four fluid pumping devices (111), (112), (113), (114) are operatively controlled by the periodic fluid direction-change operative control device (250), wherein fluid pumping devices (111), (113) at fluid port (a) and fluid port (c) are one group, while fluid pumping devices (112), (114) at fluid port (b) and fluid port (d) are the another group, both groups are operatively controlled by periodic fluid direction-change operative control device (250) to periodically alternatively produce negative pressure to attract the two fluids in different flow directions for periodic flow direction change while maintaining the flow directions of the two fluids contrary to each other at the two sides of the heat exchanger inside heat exchange device (1000);

The periodic fluid direction-change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the fluid pumping devices (111), (112), (113), (114) of the bidirectional fluid pumping device (123) being capable of producing negative pressure to attract fluid for periodically changing the flow direction of the two fluids in different flow directions passing through heat exchange device thereby operatively controlling the distribution status of 1) temperature difference; or 2) humidity difference; or 3) both temperature difference and humidity difference between fluids and heat exchanger of heat exchange device;

The timing for fluid periodic flow direction change can be 1) the open loop type operative control by presetting the direction-change period of fluid flow, or 2) the closed loop type operative control by detecting the temperature difference between fluid and heat exchanger of heat exchange device at setting locations for periodic closed loop fluid flow direction change timing operative control; or 3) randomly manual change.

The heat exchanger or full heat exchanger is embodied to have one or more than one characteristic of the following: 1) it is of the tubular structure in linear or other geometric shapes; 2) it is constituted by the multi-layer structure having fluid path for passing gaseous or liquid state fluids; or 3) it is constituted by one or more than one fluid path in series connection, parallel connection or series and parallel connection.

The comparisons between the conventional heat exchange device and the double flow-circuit heat exchange device for periodic positive and reverse directional pumping of the present invention are as shown in FIGS. 4, 5, 6 and 7;

FIG. 4 is a schematic view showing operating principles of the conventional heat exchange device having pumping fluids in different flow directions during simultaneous operation.

FIG. 5 is a schematic view showing the operation principles of the present invention.

FIG. 6 is a temperature distribution diagram of the heat exchange layer of the conventional heat exchange device having pumping fluids in different flow directions during simultaneous operation.

FIG. 7 is a temperature distribution variation diagram of the heat exchange layer of the present invention during simultaneous operation.

The comparisons between the heat exchanger of the double flow-circuit heat exchange device for periodic positive and reverse directional pumping being applied to the heat exchange device and the conventional full heat exchange device are as shown in the following FIG. 8 and FIG. 9;

FIG. 8 is the humidity distribution diagram of the full heat exchanger layer of the conventional full heat exchange device having dehumidification function being pumping fluids in different flow directions during simultaneous operation.

FIG. 9 is the humidity distribution diagram of the operating full heat exchange layer of the full heat exchange device having dehumidification function of the present invention.

From the difference of temperature difference and humidity distribution statuses as shown in said FIGS. 6, 7, 8, and 9, it can be seen that the present invention is beneficial for promoting the heat exchange effect and full heat exchange function. 

1. A double flow-circuit heat exchange device for periodic positive and reverse directional pumping which is installed with the bidirectional fluid pumping device (123), and the periodic fluid direction-change operative control device (250) for operatively controlling the bidirectional fluid pumping device (123) to the conventional heat exchange device (1000) so as to allow the fluids in two different flow directions appearing periodic change of different flow directions to pass through heat exchanger (100) inside heat exchange device (1000), wherein:

The bidirectional fluid pumping device (123): It is constituted by 1) at least four fluid pumping devices capable of producing positive pressure to push fluid; 2) at least four fluid pumping devices capable of producing negative pressure to attract fluid; or 3) at least two fluid pumping devices having both functions of producing positive pressure to push fluid and negative pressure to attract fluid for pumping gaseous or liquid state fluids, wherein the fluid pump is driven by electric motor, engine power, or mechanical or electric power converted from other wind power, thermal energy, temperature-difference energy, or solar energy, etc.; Said bidirectional fluid pumping device (123) and heat exchange device (1000) are in an integral structure or are in the separated structures;

The periodic fluid direction-change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the two fluids in different flow directions thereby operatively controlling the distribution status of 1) temperature difference; or 2) humidity difference; or 3) both temperature difference and humidity difference between fluids and heat exchanger (100) of heat exchange device (1000); The timing for fluid periodic flow direction change can be 1) the open loop type operative control by presetting the direction-change period of fluid flow, or 2) the closed loop type operative control by detecting the temperature or humidity difference between fluid and heat exchanger of heat exchange device at setting locations or by simultaneously referencing the status of temperature or humidity difference values for closed loop fluid flow direction change timing operative control; or 3) randomly manual change.
 2. A double flow-circuit heat exchange device for periodic positive and reverse directional pumping as claimed in claim 1, wherein the embodied constitution types of heat exchanger or full heat exchanger include being the tubular structure in linear or other geometric shapes.
 3. A double flow-circuit heat exchange device for periodic positive and reverse directional pumping as claimed in claim 1, wherein the embodied constitution types of heat exchanger or full heat exchanger include being constituted by the multi-layer structure having fluid path for passing gaseous or liquid state fluids.
 4. A double flow-circuit heat exchange device for periodic positive and reverse directional pumping as claimed in claim 1, wherein the embodied constitution types of heat exchanger or full heat exchanger include being constituted by one or more than one fluid path in series connection, parallel connection or series and parallel connection. 